Article View: sci.electronics
Article #19532Re: WHat are those holes for?
From: Kurt Thearling
Date: Thu, 28 Jul 1988 16:34
Date: Thu, 28 Jul 1988 16:34
34 lines
1883 bytes
1883 bytes
In article <134@ai.etl.army.mil> richr@ai.etl.army.mil (Richard Rosenthal) writes:
>Re: Man Hole Covers
>
>Triangular (3 sided) covers cannot fall through the hole.
>
this is incorrect. using the following figure, it is easy to see that
the length AC is shorter than the length AB. thus, if the manhole
were held such that AC were parallel to the ground, the manhole could
be dropped through the hole along AB.
A
/|\
/ | \
/ | \ Note: not drawn to scale. all sides are
/ | \ assumed to be the same length (i.e.,
/ | \ AB = AC = BD). also assume that
/ | \ BC = CD.
-------------
B C D
kurt
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Kurt Thearling thearlin%vdsvax.tcpip@ge-crd.arpa
General Electric CRD thearlin@vdsvax.steinmetz.ge.com
Bldg. KW, Room C313 uunet!steinmetz!vdsvax!thearlin
P.O. Box 8 thearlin%vdsvax@steinmetx.uucp
Schenectady, NY 12301 kurt%bach@uxc.cso.uiuc.edu
(518) 387-6779 kurt@bach.csg.uiuc.edu
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!steinmetz!vdsvax!thearlin From: thearlin@vdsvax.steinmetz.ge.com (Kurt Thearling) Newsgroups: sci.electronics Subject: Re: WHat are those holes for? Message-ID: <4966@vdsvax.steinmetz.ge.com> Date: 28 Jul 88 16:34:53 GMT References: <10790@oberon.USC.EDU> <327@richp1.UUCP> <303@btree.uucp> <1550@tekirl.TEK.COM> <134@ai.etl.army.mil> Reply-To: vdsvax!thearlin@steinmetz.UUCP (Kurt Thearling) Organization: General Electric CRD, Schenectady, NY Lines: 34